Manual Gate Valves are engineered for reliable isolation in industrial piping systems. Operated via a high-torque handwheel, these valves provide a robust and cost-effective solution for applications requiring dependable on/off control.
- High-Efficiency Handwheel: Designed for ergonomic operation, the handwheel provides the necessary leverage to seat the wedge securely, even in high-pressure systems.
- Non-Rising or Rising Stem: Available in Rising Stem (OS&Y) designs for easy visual position indication, or Non-Rising Stem designs for installations with limited vertical space.
- Precision Threading: The stem threads are precision-machined to ensure smooth, low-friction movement, reducing the physical effort required to open or close the valve.
- Stellite-Faced Sealing: To prevent wear and erosion, the sealing surfaces are often treated with Stellite hard-facing, ensuring a bubble-tight shut-off over thousands of cycles.
- Full-Port Design: Like our automated versions, our hand-operated valves feature a full bore to ensure minimal pressure drop and unobstructed flow.
Technical Advantages & Structural Characteristics
Manual gate valves are engineered for precision and longevity, combining advanced manufacturing standards with robust structural design to ensure reliability in the most demanding environments.
1. Compliance with Global Standards
Manual gate valves are designed and manufactured in full accordance with leading domestic and international standards. This ensures a reliable seal, superior performance, and a professional, high-quality aesthetic that meets global project specifications.
2. Superior Surface Hardening (Stellite Welding)
The sealing surfaces of the gate and valve seat are reinforced using iron-base alloy or Cobalt-base Stellite hard alloy built-up welding.
- Benefits: Exceptional wear resistance, thermal stability, and corrosion protection.
- Longevity: This treatment prevents abrasion and significantly extends the service life of the valve.
3. Flexible Wedge Structure
We utilize a wedge-type flexible gate design to ensure a tight seal even under fluctuating pressures.
- Ease of Operation: For medium and large-diameter valves, integrated thrust bearings are used to reduce friction, ensuring the valve opens and closes easily with minimal torque.
4. Advanced Stem Treatment
Valve stems undergo rigorous quenching and nitriding treatments.
- Durability: This process provides excellent surface hardness, resulting in high corrosion resistance, scratch resistance, and superior wear performance during repeated cycles.
5. Versatile Connection Options
Manual gate valves are compatible with a wide variety of standard pipe flanges and sealing surface types. This flexibility allows us to meet specific project needs and diverse engineering requirements across different regions.
6. Customizable Material Configurations
The valve body, packing, and gaskets can be customized based on specific working conditions or user requests.
- Available Materials: A vast range of alloys suitable for various pressure, temperature, and media conditions.